Database errors after activating #246

DESCRIBE wp_mlp_languages;
Table 'db.wp_mlp_languages' doesn't exist

DESCRIBE wp_multilingual_linked;
Table 'db.wp_multilingual_linked' doesn't exist

DESCRIBE wp_mlp_site_relations;
Table 'db.wp_mlp_site_relations' doesn't exist

ALTER TABLE wp_mlp_languages ADD KEY `` (`http_name`)
Incorrect index name ''

ALTER TABLE wp_multilingual_linked ADD KEY `` (`ml_blogid`,`ml_elementid`)
Incorrect index name ''

ALTER TABLE wp_mlp_site_relations ADD KEY `` (`site_1`,`site_2`)
Incorrect index name ''